MultiWii Arduino Uno Bluetooth Control

I am Android Developer, I am making a Quadcopter with Arduino Uno and uploaded MultiWii_2_4 in it. MultiWii GUI is also working I can see GY-521 MPU6050 response.

I want to control my Quadcopter fly by Android App, I want to know where I can hook up my Bluetooth HC-06 to Arduino uno and which data should I send by Android app to Bluetooth module in order to control Quadcopter such as Arming, forward, backward , yaw etc.

I don't want to use RC Transmitter and Receiver.
Please HELP !

I want to know where I can hook up my Bluetooth HC-06 to Arduino uno

Any two otherwise unused digital pins.

and which data should I send by Android app to Bluetooth module in order to control Quadcopter such as Arming, forward, backward , yaw etc.

The necessary data, of course.

What does the sketch need as input to enter arming mode? To move forward? To mote backward? To yaw(n)?